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Finding the Fourth Proportional to 693.24, 1,039.84 and 401.18

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Solution

The fourth proportional to 693.24, 1,039.84 and 401.18 is: 601.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.24 : 1,039.84 = 401.18 : x
  2. Step 2: Convert to fraction form
    693.24/1,039.84 = 401.18/x
  3. Step 3: Cross multiply
    693.24x = 1,039.84 × 401.18
  4. Step 4: Simplify right side
    693.24x = 417,163.01
  5. Step 5: Solve for x
    x = 417,163.01/693.24
  6. Step 6: Final answer
    x = 601.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.